WeakSet.prototype.delete()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.
The delete()
method of WeakSet
instances removes the specified element from this WeakSet
.
Try it
Syntax
js
weakSetInstance.delete(value)
Parameters
value
-
The value to remove from the
WeakSet
object.
Return value
true
if an element in the WeakSet
object has been removed successfully. false
if the value
is not found in the WeakSet
. Always returns false
if value
is not an object or a non-registered symbol.
Examples
Using the delete() method
js
const ws = new WeakSet();
const obj = {};
ws.add(window);
ws.delete(obj); // Returns false. No obj found to be deleted.
ws.delete(window); // Returns true. Successfully removed.
ws.has(window); // Returns false. The window is no longer present in the WeakSet.
Specifications
Specification |
---|
ECMAScript Language Specification # sec-weakset.prototype.delete |
Browser compatibility
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